Thomas keakns



(No Model.)

T. KEARNS.

. GRATE FOR ISTOV-ES AND RANGES. No. 258,766. Patented- May 30, 1882.

N PETERS. Pholo'Lithognpher. Wflihinglan. DC.

NlTED ,TATES PATENT FFICE.

THOMAS KEARNS, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR TO THE ADJUSTABLE GRATE MANUFACTURING COMPANY, OF SAME PLACE.

GRATE FOR STOVES AND RANGES.

SPECIFICATION forming part of Letters Patent No. 258,766, dated May 30, 1382,

Application filed October 19, 1881. (No model.)

To all whom it may concern:

Be it known that I, THOMAS KEARNS, a residentof San Francisco, State of California, have invented a new and useful Improvement in Grates for Stoves and Ranges, of which the following is a specification.

My invention consists in an improved device for raising and lowering the grate so as to adjust the vertical depth of the furnace without disturbing the fuel. I have obtained a patent, dated September 6, 1881, No. 246,786, for a similar invention, the present invention being an improvement thereupon intended to give greater simplicity of construction and operation, and to remove the working parts from the space directly below the grate, where ashes fall upon them.

In the accompanying drawings, Figure l is a longitudinal sectional elevation of my device. Fig. 2 is a plan. Fig. 3 is an end view.

In the different figures the same letters refer to the same parts.

A is the grate. It is provided at each end with projecting stems or pivots a a, which pivots are, in plan, a little out from centerline of grate. (See Fig. 2.) One of these pivots, a, is slightly hooked downward, as shown in Fig. 1,forconvenience ofinserting the pivots within the eye of the raising and lowering levers.

B B are two grate-supports and raising and lowering levers of the shape shown in the drawings. The front lever, B, which is the one first moved by the mechanism hereinafter described, is hung on a pivot, b, and has a little projecting spur, b, on one side, which enters the groove of the rotary cam. The lever B in like manner hangs from the pivot b. Both these levers have rings or eyes on the free end, in which the pivots of the grate rest, as shown.

0 is the ordinary grate-frame, which is common in nearly all stoves and ranges. c c are lugs cast upon it in the position shown to carry the pivots b b.

D is a rotary cam, similar to those described in my above-mentioned previous patent. It is simply a short cylindrical piece of iron, with a spiral groove cut on its circumference. E is the rod upon which this cam is secured. This rod finds support atone end by passing through a hole bored in the grate-frame, and at the other end by passing through a hole bored in the side of the stove, or, if preferred, in a lug cast on the grate-frame. It has a square end, 0, for a key.

F is a portion of the side of the stove.

G is a reversing-lever, through which a reverse motion is transmitted from the front to the back raising and lowering lever. One end of this lever is inserted in a slotted hole provided to receive it in the front lever, B, at g.

H is the pivot upon which the lever G vibrates. I is the support for-this pivot, a bracket projecting from the grate-frame.

J is an L-shaped rod connecting the reversing-lever and the back raising and lowering lever. It may be loose riveted to reversing-lever and simply penetrate a slotted hole atjin the back raising and lowering lever.

K isthe front lining of the furnace of stove.

K is the back lining.

LL are coverings east on grate so as to prevent the fuel or cinders wedging in between the eye of the lovers BBand the pivots on the grate otherwise the free working of the parts might be interfered with.

The grate would be liable to turn over and dump the fuel into the ash-pan if, with the above mechanism, the supporting-pivots were in the exact center; therefore I have moved the pivots a little to one side, making the part of the grate which is supported from falling by resting on the levers B B the heaviest. The

lightest part, being thus over-balanced can only be tipped over by a little downward pressure.

It may be desirable to lock the grate, as it were, so that it cannot be turned over to dump the ashes excepting when retired to its lowest level. To effect this I make alittle spur or projection, M, on the ring of the lever B, and I provide a groove or ledge, N, on the bi r of the grate next adjoining. In this groove the spur M is confined as it slides back and forth as the lever B is moved up or down, with the effect of preventing the grate from being tipped over. Now the groove is not quite as long as the distance the little spur travels, but ends just before the spur reaches the place it occupies when the grate is down to its lowest level, the spur being then freed from the groove entirely, and the grate, being unlocked, may be tipped over to dump the ashes. As thelever B moves in a curved line, the groove N should be large enough to allow play for the spur.

To operate my device a. socket wrench or key is placed on square end of rod E and vibrated to the right or left. This partly revolves the cam D, which, acting on the lever 13 direct and lever B through intermediate levers B and G and rod J, effects the elevation or depression of the grate, as the case may be.

What 1 claim as my invention, and desire to secure by Letters Patent, is-

1. In combination with the grate A of a furnace, the levers B, B, and G, rod J, cam I), [5

the grate A, as and for the purpose described. 20

THOMAS KEARNS.

Vitnesses:

GEORGE PARDY, LoUIs XV. BEAUMAN. 

